We look at the division of 37938408 by 688 
The aim is to understand the frequency of 688 in 37938408.

Let's proceed to step 1:
688 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 688

Moving on to step 2:
When dividing 37 by 688, we get 0 with a remainder of 37.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 37 to get 37.
Fetch the next digit (9) from the dividend, attach it to 37 and continue: 379 / 688

Let's proceed to step 3:
If we divide 379 by 688, we get 0 and a remainder of 379.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 379, we end up with 379.
Take the next digit (3) from the dividend and append it to 379, then repeat: 3793 / 688

On to step 4:
3793 divided by 688 is 5 with a remainder of 353.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 3440 away from 3793, we end up with 353.
Take the next digit (8) from the dividend and append it to 353, then repeat: 3538 / 688

Step 5:
When dividing 3538 by 688, we get 5 with a remainder of 98.
Use 5 as the next digit of our solution. 
Result so far: 55.0
If we subtract 3440 from 3538, we get 98.
Grab the next digit (4) from the dividend, add it to 98, then carry on: 984 / 688

Moving on to step 6:
688 can be fit into 984 1 times, resulting in a remainder of 296.
The number 1 becomes the next digit in our result. 
Result so far: 551.0
Deduct 688 from 984 and we're left with 296.
Take the next digit (0) from the dividend and append it to 296, then repeat: 2960 / 688

Step 7:
688 goes into 2960 4 times with a remainder of 208.
The number 4 becomes the next digit in our result. 
Result so far: 5514.0
If we take 2752 away from 2960, we end up with 208.
Fetch the next digit (8) from the dividend, attach it to 208 and continue: 2088 / 688

Advancing to step 8:
688 can be fit into 2088 3 times, resulting in a remainder of 24.
Use 3 as the next digit of our solution. 
Result so far: 55143.0
The remainder is 24 after subtracting 2064 from 2088.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 9:
The number 688 fits into 240 0 times, leaving a remainder of 240.
Write down 0 as next digit of the result. 
Result so far: 55143.0
Deduct 0 from 240 and we're left with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Step 10:
2400 divided by 688 is 3 with a remainder of 336.
The number 3 becomes the next digit in our result. 
Result so far: 55143.03
The remainder is 336 after subtracting 2064 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Step 11:
If we divide 3360 by 688, we get 4 and a remainder of 608.
Put 4 as the next digit of the answer. 
Result so far: 55143.034
Subtracting 2752 from 3360 leaves us with 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

Let's proceed to step 12:
6080 divided by 688 is 8 with a remainder of 576.
The number 8 becomes the next digit in our result. 
Result so far: 55143.0348
If we subtract 5504 from 6080, we get 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

Moving on to step 13:
The number 688 fits into 5760 8 times, leaving a remainder of 256.
The number 8 becomes the next digit in our result. 
Result so far: 55143.03488
The remainder is 256 after subtracting 5504 from 5760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

The final result is 55143.03488 with a remainder of 0.000256.